{"id": "c311", "title": "Source-rule audit of the MT-to-SP 600-year context switch", "filename": "490d_C311_Source_Rule_Audit_of_MT_SP_Context_Switch_20260924.md", "role": "Research action", "step": 311, "sha256": "c6191ce20f767d249995ccba2222fa3eaca591949b8025e219d96e05daf2b386", "bytes": 6906, "origins": ["C01–C479/packets/C311/490d_C311_Source_Rule_Audit_of_MT_SP_Context_Switch_20260924.md"], "download": "/sources/c6191ce20f767d249995ccba2222fa3eaca591949b8025e219d96e05daf2b386.md", "format": "md", "derived": false, "tags": ["Regular", "Cumulative", "Mirror / 529"], "excerpt": "490d C311 — Source-rule audit of the MT-to-SP context switch\n\n24 September 2026. One bounded continuation after C310; no C312 execution.\n\nResult: File_18, File_09 and the existing axis report support the relevant endpoint states and qualified comparisons. No pre-existing rule was located in these three documents prescr", "content": "# 490d C311 — Source-rule audit of the MT-to-SP context switch\n\n24 September 2026. One bounded continuation after C310; no C312 execution.\n\n**Result:** File_18, File_09 and the existing axis report support the relevant endpoint states and qualified comparisons. No pre-existing rule was located in these three documents prescribing C310's exact MT Noah/Flood → SP Shem-life switch. C310 remains an exact composite comparison cover; its transition has not been established as a source-prescribed chronology.\n\nThis finding limits the claim, not the arithmetic. It does not demonstrate that the cover is invalid or that no selector exists in another dependency.\n\n## The fixed question\n\nC310's unique minimum context-family cover uses the following families. Each segment retains its own Gear and rail labels; one family is not one fixed Gear.\n\n| Regular comparison family | Cainan | Terah | Sojourn | Retained LXX OFF indices |\n| --- | --- | --- | --- | --- |\n| MT Noah birth → Flood start | OFF | 0 | full 430 | j=0,2 |\n| SP Shem birth → Shem death | OFF | +60 | minimum 215 | j=3,4,5,6,7 |\n| LXX Shem-life aliases | OFF | +60 | minimum 215 | j=3,5,7; no additional coordinates |\n\nThe held cumulative field is `Shem=5890−j`, `Flood=5290−j`, j=0…7. The fixed comparison condition remains `C−B=2832`, from the regular 8464-to-Q6 and cumulative 12696-to-Q1406 constructions. Index j=1 still lacks the required upper regular endpoint 3057; its proposed pair is 3057/2457. C311 did not rerun or enlarge the endpoint census.\n\nThe audit separates three propositions: the endpoint/state ingredients are documented; qualified comparisons are permitted; a rule independently prescribes the particular annual-index-dependent selection. Support for the first two does not establish the third.\n\n## What the sources establish\n\n**File_18 supplies the regular ingredients.** Its MT minimum table gives Noah 2843 and Flood start 2243; the full-sojourn adjustment gives the familiar Normal-Gear-2 3058/2458 pair. Its ordinary Flood table explicitly fixes the full430/Terah0 context and names Gear starts 2460, 2458 and 2456. Its SP Noah/Shem table provides primary and local companion biographies; matched Shem birth/death endpoints remain 600 years apart. The shared variant fork and SP Terah discussion support the declared +60 regular state where opened. [F18-04 through F18-08]\n\nThe evidence reconstructs all six SP table-derived Shem pairs under +60 and binds the five retained SP cover segments to them. File_18 itself says these are source-controlled stations, **not six independently attested source states**. Their count must not become a count of historical witnesses. [F18-07]\n\n**File_18 permits qualified comparisons while retaining identity controls.** Its source-role statement distinguishes the number source from axiom/entity rule sources. Shared dates or spans do not create identity without matching state, node class, tradition and operator. Its comparison passages support named cross-tradition and Noah/Shem comparisons; they do not assign MT and SP contexts to the C310 indices. [F18-01 through F18-03; F18-07]\n\n**File_09 protects cumulative endpoint roles.** Cumulative Shem is an architecture boundary, not automatically an ordinary birth or death. A regular state cannot replace a cumulative state without the specified conversion/dependency. Its worked cumulative/regular comparisons show how a shared scalar can connect separately labelled endpoints without collapsing them. These rules permit careful comparison; they do not prescribe C310's change of biography, tradition, Terah setting and sojourn frame. Its seven-year anatomy also supplies no index-to-context selector for this cover. [F09-01 through F09-04]\n\n**The axis report supplies fixed comparison algebra and explicitly selected contexts.** Its common translation formula supports the bridge/anchor comparison. Its main ordinary table selects MT Normal Gear 2; its cumulative tables retain full envelopes and fixed anchors. Background SP Gear-1 and sojourn-frame examples remain separately selected constructions. The broader 5+1+1+6 interpretation is retained without claiming a fully assigned continuous chain. None of those passages prescribes this particular switch. [AX-01 through AX-06]\n\nThe axis report's narrower main-table Gear choice does not undo the later authorized Noah/Shem/Flood census. Its dependency discipline does, however, prevent treating consequences of selected premises as independent witnesses or giving generated coordinates event identities without a source/template. [AX-03; AX-07]\n\n## Provenance qualification and audit limits\n\nThe retained LXX OFF cumulative field is **derived**, not a native row printed verbatim in File_18. Its §6D prints the native Cainan-ON Flood envelope 5750–5743 and does not print a Shem row there. C311 inherits the established C266/C302 derivation rather than redescribing it as direct attestation. The frozen C302 data identifies the audited pairs; C310 supplies their minimum-cover result. [F18-09]\n\nThe review used whole-document candidate searches followed by relevant rule, state, table and comparison passages. Twenty bounded excerpts, their exact line spans and hashes, search results, two separate File_18/File_09 review notes and the author's axis review are included in the evidence. Citation IDs refer to `evidence/DATA.json`; source sections are also identified in each review note.\n\nFifteen automated citation-binding and retained arithmetic/domain assertions passed, with ten source-authentication checks. Two generated outputs replay byte identically. These checks authenticate the frozen inputs and preserve the existing match; **they do not prove textual absence or historical intention**. The source-rule conclusion is a bounded qualitative judgment. Unreviewed dependencies were not searched, and no historical endpoint or global axis claim was added.\n\n## Decision after C311\n\nPreserve C310's exact cover and annotate the transition as **not yet source-prescribed**. Do not merge the cumulative and regular event roles or promote the two contexts to one unchanged chronology. File_18, File_09, the axis source, C265 certificate and C127 graph remain unchanged.\n\n**Best next bounded step — C312, proposed only:** test whether a single source-labelled, same-Gear transport between the already admitted MT Noah→Flood and SP Shem-life 600-year pairs explains their relationship to the existing MT/LXX cumulative weave and its field boundary. Hold endpoints, bridges, anchors and allowed states fixed; test both the SP primary and local companion rails. Require one uniform rule, account for all admitted cases and boundary failures, and do not introduce a selector merely to fit the cover. This tests a constrained structural explanation without claiming it establishes historical selection. High is sufficient. C312 has not been executed.\n", "evidenceLinks": [{"id": "d-68301ab760bfbe2e", "title": "File 18"}, {"id": "d-45851004c5864229", "title": "File 09"}]}